Shortwave Radiogram, 24-27 September 2020: Do you see a pattern here?


Perhaps because of equinox propagation, reception of Shortwave Radiogram
has been difficult lately in some parts of the world. Listeners in the
eastern half of North America have been especially affected, with many
of our frequencies (15770 for example) “going long.” To compensate for
any reception difficulties this weekend, we will include some MFSK16
text – slow but robust – in addition to our usual MFSK32 and MFSK64.

We will also transmit this black-and-white test pattern in all three
modes (MFSK16, 32 and 64) so that you can observe the differences in
resolution among the MFSK modes. The transmission time is about the same
for all three …

Videos of last weekend’s Shortwave Radiogram (program 170) are provided by Scott in Ontario (Friday 1300 UTC), 2010DFS in Japan (Sunday 0800 UTC on 5850 kHz), Ralf in Germany and Frigid RF in Virginia (both Sunday 2330 UTC). The audio archive is maintained by Mark in the UK. Analysis is prepared by Roger in Germany.

This weekend’s show is in MFSK16, MFSK32, and MFSK64, with eleven MFSK images.

Here is the lineup for Shortwave Radiogram, program 171, 24-27 September 2020, in MFSK modes as noted:

1:41  MFSK32: Program preview
2:53  MFSK16: Test pattern*
4:48  Deep-space observation from lunar orbit
8:47  MFSK32: Lunar orbit (continued)
11:30  Test pattern*
13:00  MFSK64: Test pattern and other images of the week*
28:36  MFSK32: Closing announcements

* with image(s)

Please send reception reports to

And visit

Twitter: @SWRadiogram or (visit during the weekend to see listeners’ results)

Facebook group:

Shortwave Radiogram Gateway Wiki


Shortwave Radiogram Transmission Schedule

| UTC Day  | UTC Time      | Frequency        | Transmitter       |
| Thursday | 2330-2400 UTC | 9265 kHz         | WINB Pennsylvania |
| Friday   | 1300-1330 UTC | 15770 kHz        | WRMI Florida      |
| Friday   | 1500-1530 UTC | 15750 kHz DRM    | WINB Pennsylvania |
| Saturday | 0230-0300 UTC | 9265 kHz         | WINB Pennsylvania |
| Saturday | 1330-1400 UTC | 15770 kHz        | WRMI Florida      |
| Sunday   | 0800-0830 UTC | 5850 and 7730 kHz| WRMI Florida      |
| Sunday   | 2330-2400 UTC | 7780(+15770?)kHz | WRMI Florida      

The Mighty KBC transmits to North America Sundays at
0000-0200 UTC (Saturday 8-10 EDT) on 5960 kHz, via Germany. A minute of
MFSK is at about 0130 UTC.  Reports to Eric: . See also and

“This is a Music Show” Most of the show is a music
show, but the host transmits some MFSK text and image near the end of
the broadcast. It’s transmitted on WRMI, Thursdays at 0200-0300 UTC on
5850 kHz (Wednesday evening in the Americas) and a new time also on
WRMI, Wednesdays at 2100-2200 UTC on 7780 kHz (aimed towards Europe) .
Also look for a waterfall ID at the beginning of the show. .

New York and Pennsylvania NBEMS nets. Most weekends, as
KD9XB, I check in to the New York NBEMS (Narrow Band Emergency
Messaging Software) net Saturday at 1200 UTC on 3584 kHz USB, and the
Pennsylvania NBEMS net Sunday at 1200 UTC on 3583 kHz USB (with
out-of-state check-ins now starting at 1130 UTC). Check-ins are usually
in Thor 22, and messages are in MFSK32. Messages generally use the Flmsg
add-on to Fldigi. If you are a radio amateur in eastern North America,
feel free to check in. Outside the region, use an SDR in the eastern USA
to tune in and decode. You do not need Flmsg to check in, and most of
the messages can be read without Flmsg. If you can decode the net, send
me an email to , or tweet to @SWRadiogram , and I
will let them know you are tuned in. USEast NBEMS Net: Please also note the USEast NBEMS Net, Wednesdays 2300 UTC (7 pm EDT) on 3536 kHz USB.


Matt in Colorado received these images 17 September 2020, 2330-2400 UTC, on 9265 kHz from WINB Pennsylvania …


Fuente: Shortwave Radiogram, 24-27 September 2020: Do you see a pattern here?


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